Question

Find (fog)(-4)!!!!!!!

Answer 1

23

Explanation:

We can think of (f o g)(-4) as f(g(-4)).

As you can see, we start with the inner function and the output of the inner function becomes the output of the outer function.

So we'll plug in -4 for x in g(x) and then the output of this becomes the input of f(x):

`f(x)=2x-1\\g(x)=x^2-4\\f(g(-4))\\\\g(-4)=(-4)^2-4=12\\\\f(12)=2(12)-1=23`